Fathwa, - Is it permissible to take passport picture without a headscarf?

Question:
A sister was told in order to obtain a visa, she must take a picture
for her passport without a headscarf (not just niqab) -- her family
wants to know if it would be permissible/impermissible and whatever
the ruling, they would like to know the proofs behind it.
Answer:
Wa `alaykum as-Salam wa rahmatullah:
It is neither permissible in the Law nor, to our knowledge, required
by any country for passports, and the proofs behind the ruling of the
Divine Law are those of the hijab; unless it is a matter of life and
death or assured expectation of harm to one's life or property or
religion as in the case of fleeing a land of disbelief to a land of
Islam, in which cases it would be permitted and Allah knows best.